在我的views/pages/index.html.erb我有这个循环，它会显示每个类别中最新上传的图片。
<div class="container-fluid">
<% @products.each_slice(3) do |products_group| %>
<div class="row">
<% products_group.each do |category, products| %>
<% products.each_with_index do |product, index| %>
<% if index == 0 %>
<div class="col-lg-4 col-sm-6 col-xs-12 center-block " >
<%= image_tag product.image.url(:medium), class: "img-responsive" %>
<div class="caption">
<p><%= product.category.name %></p>
</div>
<% end %>
<% end %>
</div>
<% end %>
</div>
<% end %>
</div>
我一直在尝试将这行代码添加到'image_tag'部分
<%=link_to image_tag product.image.url(:medium), category_path (@category.products), class: "img-responsive" %>
因此，用户可以通过点击views/pages/index.html.erb
它给了我这个错误syntax error, unexpected ( arg, expecting keyword_do or '{' or '(' ...e.url(:medium), category_path (@category.products), class: "... ... ^ /Users/dadi/Documents/Vefir/stores/brainstore/app/views/pages/index.html.erb:25: syntax error, unexpected ',', expecting ')' ...gory_path (@category.products), class: "img-responsive" );@o... ... ^
我一直在尝试调整代码以摆脱错误，但我找不到合适的方法来做到这一点。
我不确定如何做到这一点，这里的任何人都可以引导我走向正确的道路吗？
这是我的categories_controller.rb
class CategoriesController < ApplicationController
before_action :set_category, only: [:show, :edit, :update, :destroy]
# GET /categories
# GET /categories.json
def index
@categories = Category.all
end
# GET /categories/1
# GET /categories/1.json
def show
@products = @category.products
end
# GET /categories/new
def new
@category = Category.new
end
# GET /categories/1/edit
def edit
end
# POST /categories
# POST /categories.json
def create
@category = Category.new(category_params)
respond_to do |format|
if @category.save
format.html { redirect_to @category, notice: 'Category was successfully created.' }
format.json { render :show, status: :created, location: @category }
else
format.html { render :new }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /categories/1
# PATCH/PUT /categories/1.json
def update
respond_to do |format|
if @category.update(category_params)
format.html { redirect_to @category, notice: 'Category was successfully updated.' }
format.json { render :show, status: :ok, location: @category }
else
format.html { render :edit }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
# DELETE /categories/1
# DELETE /categories/1.json
def destroy
@category.destroy
respond_to do |format|
format.html { redirect_to categories_url, notice: 'Category was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_category
@category = Category.includes(:products).find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def category_params
params.require(:category).permit(:name)
end
end
这是pages_controller.rb
class PagesController < ApplicationController
def index
@products = Product.all.order(created_at: :desc).group_by(&:category_id)
end
end
这是products_controller.rb
class ProductsController < ApplicationController
before_action :set_product, only: [:show, :edit, :update, :destroy]
before_filter :initialize_cart
before_action :authenticate_admin!, only: [ :new, :edit, :update, :create, :destroy ]
# GET /products
# GET /products.json
def index
@products = Product.all
end
# GET /products/1
# GET /products/1.json
def show
end
# GET /products/new
def new
@product = Product.new
end
# GET /products/1/edit
def edit
end
# POST /products
# POST /products.json
def create
@product = Product.new(product_params)
respond_to do |format|
if @product.save
format.html { redirect_to @product, notice: 'Product was successfully created.' }
format.json { render :show, status: :created, location: @product }
else
format.html { render :new }
format.json { render json: @product.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /products/1
# PATCH/PUT /products/1.json
def update
respond_to do |format|
if @product.update(product_params)
format.html { redirect_to @product, notice: 'Product was successfully updated.' }
format.json { render :show, status: :ok, location: @product }
else
format.html { render :edit }
format.json { render json: @product.errors, status: :unprocessable_entity }
end
end
end
# DELETE /products/1
# DELETE /products/1.json
def destroy
@product.destroy
respond_to do |format|
format.html { redirect_to products_url, notice: 'Product was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_product
@product = Product.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def product_params
params.require(:product).permit(:name, :description, :price, :image, :category_id, :stock_quantity)
end
end
这是我的routes.rb
Rails.application.routes.draw do
get 'pages/index'
get 'pages/about'
get 'pages/location'
get 'pages/stockists'
devise_for :users
resources :categories
resources :categories
resources :category_names
resources :products
resource :cart, only: [:show] do
post "add", path: "add/:id", on: :member
get :checkout
end
resources :orders, only: [ :index, :show, :create, :update ] do
member do
get :new_payment
post :pay
end
end
root 'pages#index'
end
答案 0 :(得分：1)
执行此操作的最佳方法是将link_to与块一起使用。以下是使用link_to：
<%= link_to category_path(@category.products), class: "img-responsive" do %>
<%= image_tag product.image.url(:medium) %>
<% end %>
了解有关link_to的更多信息。
答案 1 :(得分：1)
尝试将image_tag括在括号中：
<%=link_to image_tag(product.image.url(:medium)), category_path (@category.products), class: "img-responsive" %>
或使用块：
<%= link_to category_path (@category.products), class: "img-responsive" do %>
<%= image_tag product.image.url(:medium) %>
<% end %>